1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb995a3dc7d0c1c5fa08f730c8a7697993ecb6d426008391216068cc7dff7f64. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac4d0209-10d3-4df4-965e-40169e9a7ac9.json and https://artists.proofprofile.net/proofs/artist/ac4d0209-10d3-4df4-965e-40169e9a7ac9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46f9a3684ae48c1182cbf68f0cffb5f29be9686543ae5ab5990765d29405cf7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22101674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600414e3c2500d74dd87cbe4cb07a9bd2f8f16a93a7ef28054bc61129a02d22a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22102501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b659ebd783ebf6dc4714a546e9a3da1f6ceaf063039985068b2e79822fec041. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22104465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18d13b29d143ef1d5a49584227180277f359ff070bfd02c2d43afc4923a2c86. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22106721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f839d536374c3c3eaa989701d44051aefee02d8ec7c16294f5bc34b0b1466. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22106720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61766a305b4056dfff801d233c05092d7d27b6c2f284ec2c614db1dee87525a8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb48b033a1d77e05cb3e3dc7f970a0c99d618f37584acd6dc44802b5126e7dc0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22104464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2ce607e8c5886efbaa0a1912213356cad84cc8f6f5b34d839800f21bfdb245. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22220348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0953c1ad0905fc6520f1515e55362594a251d9e44b04e8c0aef2fa9dd7a6d996. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22305478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8220a744e327b73462448f66842824f61d4855f521e45b0548c081c9619f6b94. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22300889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867616043aa62506553550cf7537c3f18e584557b71a270e6320ebb5e0fe1175. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22220667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9352bce4f3cda45b2006e2a500a1bf7c0620cb5891daf9e7d20beb5910eb36. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22405704.